360° laser line module

Abstract

The utility model discloses a 360 degree laser line module, including laser diode (1) and laser collimator (2), still including injection molding mirror (3), laser diode (1), laser collimator (2) and injection molding mirror (3) are coaxial in proper order and are set, the both ends of injection molding mirror (3) are opposite respectively and are opened with first circular groove (3 1) and second circular groove (3 2), and the bottom surface of second circular groove (3 2) still is opened with the taper groove (3 3) of the taper angle to first circular groove (3 1), first circular groove (3 1), second circular groove (3 2) and taper groove (3 3) are coaxial, and first circular groove (3 1) and taper groove (3 3) are not through -going, and first circular groove (3 1) is set to laser collimator (2) one side.

Description

Technical Field

[0001] This utility model belongs to the technical field of laser module for line projectors, and specifically relates to a 360° laser line module. Background Technology

[0002] The existing 360° laser module optical path of the line projector mainly consists of a laser diode, a collimating optical module, and a reflecting cone. The laser diode emits a laser beam with a divergence angle of 9°. After passing through the collimating optical module, the laser beam is intercepted by an aperture to become a 5mm parallel beam. Finally, the parallel beam illuminates the surface of the metal reflecting cone, and after reflection by the metal reflecting cone, it forms a 360° circular line at a specific working distance. This achieves the desired working effect during the use of the end product.

[0003] The existing 360° laser module has the following problems: Reflection is achieved through metal reflective conical mirrors. In actual manufacturing, the metal conical mirrors primarily reflect light from the metal surface. During manual assembly, there is a brightness ratio issue (the ratio of light power on one side to the opposing side should be as close to 1:1 as possible), resulting in one side being brighter than the other. Furthermore, to facilitate bonding the metal reflective conical mirrors during assembly, a glass tube of a certain size is required. The parallelism of the cut edges of the glass tube directly determines whether the product will exhibit double lines due to reflection (theoretically, it should be one line, but in reality, it's two lines). Therefore, developing a new type of 360° laser line module is essential. Utility Model Content

[0004] The purpose of this invention is to solve the problems of the prior art and provide a 360° laser line module.

[0005] To solve the technical problem, the technical solution of this utility model is: a 360° laser line module, including a laser diode and a laser collimating lens, and also including an injection-molded reflector. The laser diode, laser collimating lens and injection-molded reflector are arranged coaxially in sequence. The two end faces of the injection-molded reflector are respectively provided with a first circular groove and a second circular groove. The bottom surface of the second circular groove is also provided with a conical groove with a cone angle facing the first circular groove. The first circular groove, the second circular groove and the conical groove are coaxial, and the first circular groove and the conical groove are not connected. The first circular groove is arranged facing the side of the laser collimating lens.

[0006] Preferably, the injection-molded reflector has a cylindrical structure, the first circular groove and the second circular groove have the same diameter and depth, the maximum diameter of the conical groove is smaller than the diameter of the first circular groove or the second circular groove, and the cone angle of the conical groove is 90°.

[0007] Preferably, the injection-molded reflector has a diameter of 12mm and a thickness of 10mm, the first and second circular grooves have a diameter of 8mm and a depth of 2mm, and the maximum diameter of the conical groove is 6mm.

[0008] Preferably, the injection-molded reflector is a polystyrene injection-molded reflector with a refractive index of 1.59, a glass transition temperature of 100°C, a heat distortion temperature of 70~95°C, a light transmittance of 88%, and a critical angle of total refraction of 38.7°.

[0009] Preferably, the large divergence angle of the laser diode is 22°, and the small divergence angle is 9°.

[0010] Preferably, the laser collimating lens is a plano-convex aspherical lens with a positive focal length, a diameter of 6.35 mm, a focal length of 10 mm, a curvature R of 5.931445, and a conic coefficient K of 1.5.

[0011] Compared with the prior art, the advantages of this utility model are: (1) This utility model discloses a 360° laser line module and develops and designs a new type of injection molded reflector. The injection molded reflector achieves optical total reflection inside the component through the principle of total reflection. Moreover, the injection molded reflector has good precision consistency, which can greatly optimize and improve the production and assembly efficiency of the next process. (2) The injection-molded reflector of this utility model is integrally injection molded. It does not require a transparent glass tube during installation. It can be directly pressurized with the outer shell of the laser line module, thus avoiding the problem of needing a transparent glass tube for the installation of the existing metal reflective cone mirror, and thus avoiding the problem of double lines. (3) The injection-molded reflector of this utility model is formed by integral injection molding. Integral injection molding can maximize the control of the brightness ratio of the laser module product and make the light power ratio as close as possible to 1:1. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure and optical path of a 360° laser line module according to this utility model; Figure 2 This is a schematic diagram of the injection-molded reflector structure of a 360° laser line module according to this utility model; Figure 3 This is a three-dimensional view of the injection-molded reflector of a 360° laser line module according to this utility model.

[0013] Explanation of reference numerals in the attached figures: 1. Laser diode; 2. Laser collimating lens; 3. Injection-molded reflector; 3-1, First circular groove; 3-2, Second circular groove; 3-3, Conical groove. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments. The present invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To provide the public with a thorough understanding of the present invention, specific details are described in detail in the following embodiments, but those skilled in the art will fully understand the present invention even without these details.

[0015] Example 1 like Figures 1-3 As shown, this utility model discloses a 360° laser line module, including a laser diode 1 and a laser collimating lens 2, and also includes an injection-molded reflector 3. The laser diode 1, the laser collimating lens 2, and the injection-molded reflector 3 are arranged coaxially in sequence. The two end faces of the injection-molded reflector 3 are respectively provided with a first circular groove 3-1 and a second circular groove 3-2. The bottom surface of the second circular groove 3-2 is also provided with a conical groove 3-3 with a cone angle facing the first circular groove 3-1. The first circular groove 3-1, the second circular groove 3-2, and the conical groove 3-3 are coaxial, and the first circular groove 3-1 and the conical groove 3-3 are not connected. The first circular groove 3-1 is arranged on the side facing the laser collimating lens 2.

[0016] Example 2 like Figure 2 As shown, preferably, the injection-molded reflector 3 has a cylindrical structure, the first circular groove 3-1 and the second circular groove 3-2 have the same diameter and depth, the maximum diameter of the conical groove 3-3 is smaller than the diameter of the first circular groove 3-1 or the second circular groove 3-2, and the cone angle of the conical groove 3-3 is 90°.

[0017] Preferably, the injection-molded reflector 3 has a diameter of 12mm and a thickness of 10mm, the first circular groove 3-1 and the second circular groove 3-2 have a diameter of 8mm and a depth of 2mm, and the maximum diameter of the conical groove 3-3 is 6mm.

[0018] Preferably, the injection-molded reflector 3 is a polystyrene injection-molded reflector with a refractive index of 1.59, a glass transition temperature of 100°C, a heat distortion temperature of 70~95°C, a light transmittance of 88%, and a critical angle of total refraction of 38.7°.

[0019] Example 3 Preferably, the large divergence angle of the laser diode 1 is 22° (equivalent to approximately NA0.38), and the small divergence angle is 9° (equivalent to approximately NA0.185).

[0020] Preferably, the laser collimating lens 2 is a plano-convex aspherical lens with a positive focal length, a diameter of 6.35 mm, a focal length of 10 mm, a curvature R of 5.931445, and a conic coefficient K of 1.5. The laser collimating lens 2 is made of materials such as D-ZK3, A11.5E-3, A2-2.4E-5, or A39.7E-6.

[0021] The working principle of this utility model is as follows: like Figures 1-3 As shown, this invention mainly consists of a laser diode 1, a laser collimating lens 2, and an injection-molded reflector 3. Utilizing the principle of total internal reflection, total internal reflection occurs within the optical components. The injection-molded reflector 3 is made of PS (polystyrene) material with a refractive index of 1.59, a glass transition temperature of 100℃, a heat distortion temperature of 70~95℃, a long-term operating temperature of 60~80℃, a light transmittance of 88%, and a critical angle of total refraction of 38.7°. The laser diode 1 emits a diverging laser beam with a divergence angle of 9°. This laser beam is collimated by the laser collimating lens 2 with a focal length of 10mm, resulting in a collimated laser beam diameter of 3.2mm. An aperture is installed at the exit port to intercept excess laser light. Finally, the collimated laser beam is perpendicularly incident on the injection-molded reflector 3. When the beam strikes the inclined material surface of the conical groove 3-3, total internal reflection occurs because the angle of incidence of the normal is greater than the total internal reflection angle. The divergence angle is finely adjusted by adjusting the distance between the laser collimating lens and the laser diode, thereby controlling the effect of the reflected beam.

[0022] This utility model discloses a 360° laser line module and develops a new type of injection-molded reflector. The injection-molded reflector achieves total internal optical reflection of the component through the principle of total internal reflection. Moreover, the injection-molded reflector has excellent precision consistency, which can greatly optimize and improve the production and assembly efficiency of the next process.

[0023] This utility model of injection-molded reflector is integrally injection molded, and does not require a transparent glass tube during installation. It can be directly interference-fitted with the outer shell of the laser line module, avoiding the problem of requiring a transparent glass tube for the installation of existing metal reflective cone mirrors, thus avoiding the problem of duplicate lines.

[0024] This utility model of injection-molded reflector is formed by integral injection molding. Integral injection molding can maximize the control of the brightness-to-dark ratio of laser module products, so that the optical power ratio is as close to 1:1 as possible.

[0025] This utility model uses polystyrene for injection molding of the injection-molded reflector, replacing the module design of the traditional metal reflective cone mirror. Compared with the processing of metal reflective cone mirrors, the injection molding process has the advantages of lower cost and optimized product assembly process.

[0026] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0027] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A 360° laser line module, comprising a laser diode (1) and a laser collimating lens (2), characterized in that: It also includes an injection-molded reflector (3), a laser diode (1), a laser collimator (2) and the injection-molded reflector (3) are arranged coaxially in sequence. The two ends of the injection-molded reflector (3) are respectively provided with a first circular groove (3-1) and a second circular groove (3-2). The bottom surface of the second circular groove (3-2) is also provided with a conical groove (3-3) with a cone angle facing the first circular groove (3-1). The first circular groove (3-1), the second circular groove (3-2) and the conical groove (3-3) are coaxial, and the first circular groove (3-1) and the conical groove (3-3) are not connected. The first circular groove (3-1) is arranged on the side facing the laser collimator (2).

2. The 360° laser line module according to claim 1, characterized in that: The injection-molded reflector (3) has a cylindrical structure. The diameter and depth of the first circular groove (3-1) and the second circular groove (3-2) are the same. The maximum diameter of the conical groove (3-3) is smaller than the diameter of the first circular groove (3-1) or the second circular groove (3-2). The cone angle of the conical groove (3-3) is 90°.

3. A 360° laser line module according to claim 2, characterized in that: The injection-molded reflector (3) has a diameter of 12 mm and a thickness of 10 mm. The first circular groove (3-1) and the second circular groove (3-2) have a diameter of 8 mm and a depth of 2 mm. The maximum diameter of the conical groove (3-3) is 6 mm.

4. A 360° laser line module according to claim 2, characterized in that: The injection-molded reflector (3) is a polystyrene injection-molded reflector with a refractive index of 1.59, a glass transition temperature of 100℃, a heat distortion temperature of 70~95℃, a light transmittance of 88%, and a critical angle of total refraction of 38.7°.

5. A 360° laser line module according to claim 1, characterized in that: The large divergence angle of the laser diode (1) is 22°, and the small divergence angle is 9°.

6. A 360° laser line module according to claim 1, characterized in that: The laser collimating lens (2) is a plano-convex aspherical lens with a positive focal length, a diameter of 6.35 mm, a focal length of 10 mm, a curvature of R-5.931445, and a conic coefficient of K1.5.

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